FREE Online Puzzle Games

• http://www.shockwave.com or http://www.shockwave.com/home.jsp
• http://www.bigfishgames.com/online-games/genres/4/puzzle.html 
• http://www.incredigames.com/category/Puzzle/cat360046 
• http://www.myhappygames.com/game/13692/Angry-Birds-Rio-Online.html  (also offer FREE download English or Chinese version of " Angry Birds Rio Online Game" if you install their FREE GameBox first)